APA (7th ed.) Citation

Phelps, O. W. (1967). Introduction to labor economics: 4th ed. McGraw-Hill.

Chicago Style (17th ed.) Citation

Phelps, Orme W. Introduction to Labor Economics: 4th Ed. New York: McGraw-Hill, 1967.

MLA (9th ed.) Citation

Phelps, Orme W. Introduction to Labor Economics: 4th Ed. McGraw-Hill, 1967.